Description

This page contains the results for the final fates simulation, using the fitted model object.

Simulation steps

For each combination of origin and rear type, the following steps were run:

  1. Extract the median covariate values experienced by all fish in the dataset (for spill window, winter spill days, and temperature). For spill window and temperature, these median values are separately estimated for fish moving upstream (previous state a downstream mainstem state) vs. moving downstream (previous state an upstream mainstem state or a tributary), as well as for fish moving during the winter/spring and summer/fall. This results in four different median temperatures (winter/spring, upstream; winter/spring, downstream; summer/fall, upstream; summer/fall, downstream) These values are then used in the simulation.
  2. Randomly select one iteration from the model (one set of draws for all parameters). When given the choice, parameters corrected for detection efficiency were chosen (no parameters were used that were only estimated for years where detection efficiency was not estimated).
  3. Simulate 1,000 fish that start at Bonneville Dam and move through the basin, with movements governed by the median covariate values and the values of the parameters from that iteration of the model.
  4. Repeat steps 2 and 3 1,000 times, for a total of 1,000,000 simulated fish.

For each tributary, the final fates are plotted. If a tributary has both a hatchery and natural origin population, the final fates are compared.

Notes

  1. A consistent issue across many populations is an overestimation of straying rates, particularly into the Deschutes River. See the “Outstanding issues” tab for more information on this issue, which I am still trying to resolve.
  2. The Grande Ronde, Salmon, and Clearwater Rivers all do not have arrays set up to estimate detection efficiency, which is why their mainstem final fates are much higher.

Final fates - fit to data

Below is a plot comparing the simulated final fates to those observed in the data. For this plot, the final fates from the data only includes the years where detection efficiency was estimable (meaning that there was both a river mouth site and upstream sites available). This includes detections at both mouth and upstream states, whereas the model only models detections at the mouth site (but uses the upstream sites to estimate detection efficiency at that site). While not a perfect comparison, this gives a feel for how well the simulated final fates are fitting the data.

Final fates, from the model vs. the data.
Final fates, from the model vs. the data.


Some observations:

  1. The model estimated final fate in the home state is frequently (but not always) higher than that from the data, and mainstem final fates are frequently lower than that from the data. This may be due to the detection efficiency correction.
  2. The Deschutes River (points) is fairly consistently overestimated for Middle Columbia populations, but the only populations where this overestimation is severe is Fifteenmile Creek and Umatilla River (hatchery)

Middle Columbia

Median upstream/downstream conditions across the DPS

Median upstream and downstream temperature conditions (degrees Celsius) for Middle Columbia Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.58 (7005) 11.9 (1827)
mainstem, MCN to ICH or PRA 18.96 (3639) 8.25 (424)
mainstem, PRA to RIS 19.53 (141) 10.64 (25)
mainstem, RIS to RRE 19.08 (59) 10.89 (12)
mainstem, RRE to WEL 19.24 (28) 6.02 (5)
mainstem, upstream of WEL 17.73 (15) 5.39 (2)
mainstem, ICH to LGR 15.81 (849) 6.94 (148)
mainstem, upstream of LGR 14.03 (366) NA (0)
Median upstream and downstream spill conditions (kcfs) for Middle Columbia Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.65 (7005) 1.31 (1827)
mainstem, MCN to ICH or PRA 0 (3639) 31.75 (424)
mainstem, PRA to RIS 23.15 (141) 2.24 (25)
mainstem, RIS to RRE 17.3 (59) 9.25 (12)
mainstem, RRE to WEL 5.27 (28) 0 (5)
mainstem, upstream of WEL 0.05 (15) 7.08 (2)
mainstem, ICH to LGR 0 (849) 24.97 (148)
mainstem, upstream of LGR 0 (366) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Middle Columbia Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.45 (2904) 18.13 (223)
mainstem, MCN to ICH or PRA 19.11 (2131) 16.28 (484)
mainstem, PRA to RIS 19.31 (56) 16.83 (13)
mainstem, RIS to RRE 18.37 (23) 13.71 (5)
mainstem, RRE to WEL 17.64 (11) 13.69 (5)
mainstem, upstream of WEL 14.39 (6) NA (0)
mainstem, ICH to LGR 17.27 (1571) 8.32 (244)
mainstem, upstream of LGR 16.13 (591) 7.49 (1)
Median upstream and downstream spill conditions (kcfs) for Middle Columbia Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 88.5 (2904) 1.62 (223)
mainstem, MCN to ICH or PRA 20.71 (2131) 0.66 (484)
mainstem, PRA to RIS 16.35 (56) 1.03 (13)
mainstem, RIS to RRE 10.38 (23) 0 (5)
mainstem, RRE to WEL 0 (11) 0.63 (5)
mainstem, upstream of WEL 0.73 (6) NA (0)
mainstem, ICH to LGR 0.13 (1571) 0 (244)
mainstem, upstream of LGR 0 (591) 72.37 (1)
Final fates of Deschutes River Steelhead.
Final fates of Deschutes River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Deschutes River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.5 (1046) 10.74 (4)
mainstem, MCN to ICH or PRA 19.3 (7) 5.72 (1)
mainstem, PRA to RIS NA (0) NA (0)
mainstem, RIS to RRE NA (0) NA (0)
mainstem, RRE to WEL NA (0) NA (0)
mainstem, upstream of WEL NA (0) NA (0)
mainstem, ICH to LGR 11.53 (2) 6.01 (2)
mainstem, upstream of LGR 10.2 (2) NA (0)
Median upstream and downstream spill conditions (kcfs) for Deschutes River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.56 (1046) 10.96 (4)
mainstem, MCN to ICH or PRA 0 (7) 44.82 (1)
mainstem, PRA to RIS NA (0) NA (0)
mainstem, RIS to RRE NA (0) NA (0)
mainstem, RRE to WEL NA (0) NA (0)
mainstem, upstream of WEL NA (0) NA (0)
mainstem, ICH to LGR 0 (2) 9.72 (2)
mainstem, upstream of LGR 9.85 (2) NA (0)



Final fates of John Day River Steelhead.
Final fates of John Day River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for John Day River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.56 (2832) 12.8 (1154)
mainstem, MCN to ICH or PRA 19.3 (1837) 8.68 (147)
mainstem, PRA to RIS 19.67 (28) 12.37 (3)
mainstem, RIS to RRE 18.32 (7) NA (0)
mainstem, RRE to WEL 18.32 (1) NA (0)
mainstem, upstream of WEL 17.05 (1) NA (0)
mainstem, ICH to LGR 16.08 (415) 6.77 (44)
mainstem, upstream of LGR 14.02 (191) NA (0)
Median upstream and downstream spill conditions (kcfs) for John Day River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.26 (2832) 1.31 (1154)
mainstem, MCN to ICH or PRA 0 (1837) 23.59 (147)
mainstem, PRA to RIS 22.86 (28) 1.14 (3)
mainstem, RIS to RRE 0 (7) NA (0)
mainstem, RRE to WEL 0 (1) NA (0)
mainstem, upstream of WEL 0 (1) NA (0)
mainstem, ICH to LGR 0 (415) 21.31 (44)
mainstem, upstream of LGR 0 (191) NA (0)



Final fates of Fifteenmile Creek Steelhead.
Final fates of Fifteenmile Creek Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Fifteenmile Creek Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.45 (490) 8.25 (90)
mainstem, MCN to ICH or PRA 17.37 (47) 7.9 (2)
mainstem, PRA to RIS NA (0) NA (0)
mainstem, RIS to RRE NA (0) NA (0)
mainstem, RRE to WEL NA (0) NA (0)
mainstem, upstream of WEL NA (0) NA (0)
mainstem, ICH to LGR 15.77 (6) 7.16 (1)
mainstem, upstream of LGR 11.72 (2) NA (0)
Median upstream and downstream spill conditions (kcfs) for Fifteenmile Creek Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 82.46 (490) 1.62 (90)
mainstem, MCN to ICH or PRA 0 (47) 22.39 (2)
mainstem, PRA to RIS NA (0) NA (0)
mainstem, RIS to RRE NA (0) NA (0)
mainstem, RRE to WEL NA (0) NA (0)
mainstem, upstream of WEL NA (0) NA (0)
mainstem, ICH to LGR 0 (6) 66.01 (1)
mainstem, upstream of LGR 21.75 (2) NA (0)



Final fates of Umatilla River Steelhead.
Final fates of Umatilla River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Umatilla River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.9 (1216) 9.95 (470)
mainstem, MCN to ICH or PRA 18.92 (559) 8.4 (65)
mainstem, PRA to RIS 19.85 (14) 11.92 (2)
mainstem, RIS to RRE 19.15 (5) 10.17 (3)
mainstem, RRE to WEL 19.64 (4) 10.26 (1)
mainstem, upstream of WEL 18.43 (1) NA (0)
mainstem, ICH to LGR 14.72 (128) 6.97 (41)
mainstem, upstream of LGR 13.48 (68) NA (0)
Median upstream and downstream spill conditions (kcfs) for Umatilla River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 90.55 (1216) 1.28 (470)
mainstem, MCN to ICH or PRA 0 (559) 68.95 (65)
mainstem, PRA to RIS 26.1 (14) 97.39 (2)
mainstem, RIS to RRE 19.61 (5) 9.5 (3)
mainstem, RRE to WEL 8.34 (4) 108.37 (1)
mainstem, upstream of WEL 0 (1) NA (0)
mainstem, ICH to LGR 0 (128) 42.22 (41)
mainstem, upstream of LGR 2.43 (68) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Umatilla River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.58 (599) 9.42 (72)
mainstem, MCN to ICH or PRA 18.66 (223) 8.1 (17)
mainstem, PRA to RIS 11.13 (4) NA (0)
mainstem, RIS to RRE 5.51 (1) NA (0)
mainstem, RRE to WEL NA (0) NA (0)
mainstem, upstream of WEL NA (0) NA (0)
mainstem, ICH to LGR 15.5 (36) 8.7 (2)
mainstem, upstream of LGR 12.99 (10) NA (0)
Median upstream and downstream spill conditions (kcfs) for Umatilla River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 84.18 (599) 1.31 (72)
mainstem, MCN to ICH or PRA 0 (223) 15.32 (17)
mainstem, PRA to RIS 1.38 (4) NA (0)
mainstem, RIS to RRE 0 (1) NA (0)
mainstem, RRE to WEL NA (0) NA (0)
mainstem, upstream of WEL NA (0) NA (0)
mainstem, ICH to LGR 0 (36) 67.99 (2)
mainstem, upstream of LGR 0 (10) NA (0)



Final fates of Yakima River Steelhead.
Final fates of Yakima River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Yakima River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.66 (675) 17.2 (46)
mainstem, MCN to ICH or PRA 19.14 (547) 11.6 (76)
mainstem, PRA to RIS 19.49 (86) 9.76 (14)
mainstem, RIS to RRE 19.26 (35) 18.84 (5)
mainstem, RRE to WEL 19.46 (17) 11.98 (2)
mainstem, upstream of WEL 18.5 (9) 7.04 (1)
mainstem, ICH to LGR 16.76 (22) 5.11 (3)
mainstem, upstream of LGR 12.05 (7) NA (0)
Median upstream and downstream spill conditions (kcfs) for Yakima River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 90.63 (675) 1.21 (46)
mainstem, MCN to ICH or PRA 0.7 (547) 0.9 (76)
mainstem, PRA to RIS 22.63 (86) 2.25 (14)
mainstem, RIS to RRE 17.07 (35) 17.43 (5)
mainstem, RRE to WEL 7.36 (17) 0 (2)
mainstem, upstream of WEL 0.46 (9) 14.16 (1)
mainstem, ICH to LGR 0 (22) 21.25 (3)
mainstem, upstream of LGR 0.02 (7) NA (0)



Final fates of Walla Walla River Steelhead.
Final fates of Walla Walla River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Walla Walla River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.41 (746) 16.12 (63)
mainstem, MCN to ICH or PRA 17.67 (642) 6.62 (133)
mainstem, PRA to RIS 19.28 (13) 5.47 (6)
mainstem, RIS to RRE 18.91 (12) 7.45 (4)
mainstem, RRE to WEL 17.24 (6) 4.66 (2)
mainstem, upstream of WEL 8.97 (4) 3.74 (1)
mainstem, ICH to LGR 15.56 (276) 6.97 (57)
mainstem, upstream of LGR 14.42 (96) NA (0)
Median upstream and downstream spill conditions (kcfs) for Walla Walla River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 90.53 (746) 1.14 (63)
mainstem, MCN to ICH or PRA 0 (642) 44.27 (133)
mainstem, PRA to RIS 26.14 (13) 0.63 (6)
mainstem, RIS to RRE 9.56 (12) 0 (4)
mainstem, RRE to WEL 0 (6) 0 (2)
mainstem, upstream of WEL 0.01 (4) 0 (1)
mainstem, ICH to LGR 0 (276) 17.53 (57)
mainstem, upstream of LGR 0.02 (96) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Walla Walla River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.39 (2305) 19.65 (151)
mainstem, MCN to ICH or PRA 19.16 (1908) 16.96 (467)
mainstem, PRA to RIS 19.34 (52) 16.83 (13)
mainstem, RIS to RRE 18.42 (22) 13.71 (5)
mainstem, RRE to WEL 17.64 (11) 13.69 (5)
mainstem, upstream of WEL 14.39 (6) NA (0)
mainstem, ICH to LGR 17.28 (1535) 8.32 (242)
mainstem, upstream of LGR 16.19 (581) 7.49 (1)
Median upstream and downstream spill conditions (kcfs) for Walla Walla River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.02 (2305) 26.09 (151)
mainstem, MCN to ICH or PRA 47.75 (1908) 0.66 (467)
mainstem, PRA to RIS 21.66 (52) 1.03 (13)
mainstem, RIS to RRE 12.08 (22) 0 (5)
mainstem, RRE to WEL 0 (11) 0.63 (5)
mainstem, upstream of WEL 0.73 (6) NA (0)
mainstem, ICH to LGR 0.19 (1535) 0 (242)
mainstem, upstream of LGR 0 (581) 72.37 (1)

Upper Columbia

Median upstream and downstream temperature conditions (degrees Celsius) for Upper Columbia Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.59 (1304) 20.06 (46)
mainstem, MCN to ICH or PRA 19.83 (1030) 19.35 (18)
mainstem, PRA to RIS 19.06 (1029) 18.68 (13)
mainstem, RIS to RRE 18.64 (1011) 14.46 (44)
mainstem, RRE to WEL 18.52 (731) 7.53 (179)
mainstem, upstream of WEL 17.05 (518) 8.34 (37)
mainstem, ICH to LGR 17.12 (3) NA (0)
mainstem, upstream of LGR 16.52 (3) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Upper Columbia Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.86 (13392) 20.55 (232)
mainstem, MCN to ICH or PRA 20.15 (10198) 19.93 (133)
mainstem, PRA to RIS 19.16 (10129) 18.34 (114)
mainstem, RIS to RRE 18.56 (9814) 10.72 (717)
mainstem, RRE to WEL 18.3 (8741) 9.34 (504)
mainstem, upstream of WEL 15.91 (7582) 8.86 (85)
mainstem, ICH to LGR 18.15 (4) 6.95 (3)
mainstem, upstream of LGR 12.99 (6) NA (0)
Median upstream and downstream spill conditions (kcfs) for Upper Columbia Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.56 (1304) 1.32 (46)
mainstem, MCN to ICH or PRA 67.7 (1030) 74.27 (18)
mainstem, PRA to RIS 7.58 (1029) 17.7 (13)
mainstem, RIS to RRE 0.13 (1011) 0.05 (44)
mainstem, RRE to WEL 0 (731) 0.13 (179)
mainstem, upstream of WEL 0.04 (518) 7.86 (37)
mainstem, ICH to LGR 0 (3) NA (0)
mainstem, upstream of LGR 0 (3) NA (0)
Median upstream and downstream spill conditions (kcfs) for Upper Columbia Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 85.74 (13392) 5.19 (232)
mainstem, MCN to ICH or PRA 57.44 (10198) 57.05 (133)
mainstem, PRA to RIS 1.65 (10129) 8.37 (114)
mainstem, RIS to RRE 0 (9814) 3.9 (717)
mainstem, RRE to WEL 0 (8741) 0.05 (504)
mainstem, upstream of WEL 0.04 (7582) 14.16 (85)
mainstem, ICH to LGR 6.49 (4) 0.5 (3)
mainstem, upstream of LGR 4.98 (6) NA (0)
Final fates of Wenatchee River Steelhead.
Final fates of Wenatchee River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Wenatchee River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.39 (417) 20.3 (14)
mainstem, MCN to ICH or PRA 19.67 (328) 19.64 (5)
mainstem, PRA to RIS 19.01 (328) 19.48 (5)
mainstem, RIS to RRE 18.69 (326) 13.89 (25)
mainstem, RRE to WEL 19.03 (41) 16.9 (19)
mainstem, upstream of WEL 18.15 (29) 7.88 (3)
mainstem, ICH to LGR NA (0) NA (0)
mainstem, upstream of LGR NA (0) NA (0)
Median upstream and downstream spill conditions (kcfs) for Wenatchee River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.94 (417) 1.35 (14)
mainstem, MCN to ICH or PRA 72.17 (328) 0.05 (5)
mainstem, PRA to RIS 19.16 (328) 25.9 (5)
mainstem, RIS to RRE 1.46 (326) 0 (25)
mainstem, RRE to WEL 5.8 (41) 0 (19)
mainstem, upstream of WEL 0.64 (29) 5.2 (3)
mainstem, ICH to LGR NA (0) NA (0)
mainstem, upstream of LGR NA (0) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Wenatchee River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.5 (4545) 20.39 (66)
mainstem, MCN to ICH or PRA 19.86 (3498) 19.94 (51)
mainstem, PRA to RIS 19.07 (3477) 18.89 (52)
mainstem, RIS to RRE 18.6 (3346) 10.38 (669)
mainstem, RRE to WEL 18.25 (2521) 8.79 (334)
mainstem, upstream of WEL 16.16 (1616) 9.57 (24)
mainstem, ICH to LGR 17.52 (1) 6.95 (1)
mainstem, upstream of LGR 14.43 (2) NA (0)
Median upstream and downstream spill conditions (kcfs) for Wenatchee River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 87.18 (4545) 40.53 (66)
mainstem, MCN to ICH or PRA 65.24 (3498) 70.43 (51)
mainstem, PRA to RIS 3.6 (3477) 22.22 (52)
mainstem, RIS to RRE 0 (3346) 4.27 (669)
mainstem, RRE to WEL 0.01 (2521) 0.05 (334)
mainstem, upstream of WEL 0.04 (1616) 8.83 (24)
mainstem, ICH to LGR 0 (1) 2.6 (1)
mainstem, upstream of LGR 9.18 (2) NA (0)



Final fates of Entiat River Steelhead.
Final fates of Entiat River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Entiat River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.59 (509) 20.03 (17)
mainstem, MCN to ICH or PRA 19.79 (397) 18.93 (8)
mainstem, PRA to RIS 18.98 (399) 13.96 (4)
mainstem, RIS to RRE 18.57 (389) 12.71 (18)
mainstem, RRE to WEL 18.48 (399) 7.13 (152)
mainstem, upstream of WEL 17.05 (199) 8.61 (31)
mainstem, ICH to LGR NA (0) NA (0)
mainstem, upstream of LGR NA (0) NA (0)
Median upstream and downstream spill conditions (kcfs) for Entiat River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.37 (509) 1.29 (17)
mainstem, MCN to ICH or PRA 65.62 (397) 79.44 (8)
mainstem, PRA to RIS 7.31 (399) 23.82 (4)
mainstem, RIS to RRE 0 (389) 0.14 (18)
mainstem, RRE to WEL 0 (399) 0.13 (152)
mainstem, upstream of WEL 0.04 (199) 8.01 (31)
mainstem, ICH to LGR NA (0) NA (0)
mainstem, upstream of LGR NA (0) NA (0)



Final fates of Okanogan River Steelhead.
Final fates of Okanogan River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Okanogan River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.82 (1132) 20.83 (38)
mainstem, MCN to ICH or PRA 20.03 (872) 20 (14)
mainstem, PRA to RIS 19.06 (866) 13.81 (4)
mainstem, RIS to RRE 18.51 (844) 15.17 (4)
mainstem, RRE to WEL 18.38 (825) 16.6 (19)
mainstem, upstream of WEL 16.26 (824) 7.64 (33)
mainstem, ICH to LGR 18.91 (1) 5.34 (1)
mainstem, upstream of LGR 14.02 (2) NA (0)
Median upstream and downstream spill conditions (kcfs) for Okanogan River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 86.48 (1132) 1.42 (38)
mainstem, MCN to ICH or PRA 23.67 (872) 1.03 (14)
mainstem, PRA to RIS 3.49 (866) 60.69 (4)
mainstem, RIS to RRE 0 (844) 14.95 (4)
mainstem, RRE to WEL 0 (825) 0 (19)
mainstem, upstream of WEL 0.02 (824) 15.12 (33)
mainstem, ICH to LGR 8.85 (1) 0.5 (1)
mainstem, upstream of LGR 4.98 (2) NA (0)



Final fates of Methow River Steelhead.
Final fates of Methow River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Methow River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.74 (378) 20.09 (15)
mainstem, MCN to ICH or PRA 20 (305) 19.69 (5)
mainstem, PRA to RIS 19.16 (302) 19.18 (4)
mainstem, RIS to RRE 18.66 (296) 15.43 (1)
mainstem, RRE to WEL 18.52 (291) 15.38 (8)
mainstem, upstream of WEL 16.97 (290) 6.7 (3)
mainstem, ICH to LGR 17.12 (3) NA (0)
mainstem, upstream of LGR 16.52 (3) NA (0)
Median upstream and downstream spill conditions (kcfs) for Methow River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.33 (378) 1.31 (15)
mainstem, MCN to ICH or PRA 63.7 (305) 75.66 (5)
mainstem, PRA to RIS 6.61 (302) 1.6 (4)
mainstem, RIS to RRE 0.12 (296) 29.84 (1)
mainstem, RRE to WEL 0.08 (291) 3.46 (8)
mainstem, upstream of WEL 0.04 (290) 5.46 (3)
mainstem, ICH to LGR 0 (3) NA (0)
mainstem, upstream of LGR 0 (3) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Methow River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.93 (7715) 20.55 (128)
mainstem, MCN to ICH or PRA 20.32 (5828) 19.8 (68)
mainstem, PRA to RIS 19.29 (5786) 17.94 (58)
mainstem, RIS to RRE 18.56 (5624) 14.67 (44)
mainstem, RRE to WEL 18.3 (5395) 9.96 (151)
mainstem, upstream of WEL 15.86 (5142) 10.17 (28)
mainstem, ICH to LGR 18.15 (2) 14.38 (1)
mainstem, upstream of LGR 12.41 (2) NA (0)
Median upstream and downstream spill conditions (kcfs) for Methow River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 85.63 (7715) 1.69 (128)
mainstem, MCN to ICH or PRA 30.67 (5828) 55.74 (68)
mainstem, PRA to RIS 1.02 (5786) 0.99 (58)
mainstem, RIS to RRE 0 (5624) 0.01 (44)
mainstem, RRE to WEL 0 (5395) 0.13 (151)
mainstem, upstream of WEL 0.05 (5142) 15.26 (28)
mainstem, ICH to LGR 15.44 (2) 0 (1)
mainstem, upstream of LGR 7.12 (2) NA (0)

Snake River

Median upstream and downstream temperature conditions (degrees Celsius) for Snake River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.4 (6131) 17.34 (515)
mainstem, MCN to ICH or PRA 19.26 (4961) 17.1 (239)
mainstem, PRA to RIS 19.39 (99) 11.49 (37)
mainstem, RIS to RRE 18.78 (58) 9.54 (18)
mainstem, RRE to WEL 18.38 (36) 12.88 (11)
mainstem, upstream of WEL 15.97 (25) 13.01 (1)
mainstem, ICH to LGR 16.84 (4735) 7.3 (280)
mainstem, upstream of LGR 15.86 (4443) 11.68 (6)
Median upstream and downstream temperature conditions (degrees Celsius) for Snake River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.42 (28332) 17.65 (1858)
mainstem, MCN to ICH or PRA 19.12 (22516) 18.08 (676)
mainstem, PRA to RIS 18.95 (370) 12.8 (95)
mainstem, RIS to RRE 18.28 (227) 9.4 (48)
mainstem, RRE to WEL 17.74 (164) 9.54 (39)
mainstem, upstream of WEL 14.85 (132) 7.15 (8)
mainstem, ICH to LGR 16.83 (21198) 7.34 (1046)
mainstem, upstream of LGR 15.61 (19810) 11.42 (13)
Median upstream and downstream spill conditions (kcfs) for Snake River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 83.46 (6131) 1.32 (515)
mainstem, MCN to ICH or PRA 0 (4961) 48.71 (239)
mainstem, PRA to RIS 7.59 (99) 6.1 (37)
mainstem, RIS to RRE 0 (58) 4.12 (18)
mainstem, RRE to WEL 0 (36) 0.29 (11)
mainstem, upstream of WEL 0.19 (25) 0.69 (1)
mainstem, ICH to LGR 0 (4735) 4.09 (280)
mainstem, upstream of LGR 0 (4443) 28.36 (6)
Median upstream and downstream spill conditions (kcfs) for Snake River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 69.27 (28332) 1.26 (1858)
mainstem, MCN to ICH or PRA 0 (22516) 0.61 (676)
mainstem, PRA to RIS 2.6 (370) 2.17 (95)
mainstem, RIS to RRE 0 (227) 0 (48)
mainstem, RRE to WEL 0 (164) 0 (39)
mainstem, upstream of WEL 0.02 (132) 0.9 (8)
mainstem, ICH to LGR 0 (21198) 0.6 (1046)
mainstem, upstream of LGR 0 (19810) 28.88 (13)
Final fates of Asotin Creek Steelhead.
Final fates of Asotin Creek Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Asotin Creek Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.56 (571) 18.3 (62)
mainstem, MCN to ICH or PRA 19.34 (452) 16.78 (29)
mainstem, PRA to RIS 19.29 (22) 8.83 (9)
mainstem, RIS to RRE 18.56 (14) 11.35 (6)
mainstem, RRE to WEL 18.45 (11) 11.36 (2)
mainstem, upstream of WEL 16.27 (6) 13.01 (1)
mainstem, ICH to LGR 16.85 (423) 16.92 (21)
mainstem, upstream of LGR 16.41 (399) 9.69 (2)
Median upstream and downstream spill conditions (kcfs) for Asotin Creek Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 90.55 (571) 1.27 (62)
mainstem, MCN to ICH or PRA 0.99 (452) 1.22 (29)
mainstem, PRA to RIS 14.62 (22) 5.15 (9)
mainstem, RIS to RRE 0 (14) 4.93 (6)
mainstem, RRE to WEL 0 (11) 0.62 (2)
mainstem, upstream of WEL 0.35 (6) 0.69 (1)
mainstem, ICH to LGR 0 (423) 11.56 (21)
mainstem, upstream of LGR 0 (399) 28.73 (2)



Final fates of Clearwater River Steelhead.
Final fates of Clearwater River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Clearwater River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.09 (1692) 12.35 (159)
mainstem, MCN to ICH or PRA 18.84 (1446) 11.95 (34)
mainstem, PRA to RIS 19.39 (11) 12.77 (6)
mainstem, RIS to RRE 18.95 (7) NA (0)
mainstem, RRE to WEL 19.14 (1) NA (0)
mainstem, upstream of WEL 17.92 (1) NA (0)
mainstem, ICH to LGR 16.29 (1330) 7.06 (36)
mainstem, upstream of LGR 14.54 (1299) NA (0)
Median upstream and downstream spill conditions (kcfs) for Clearwater River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 1.51 (1692) 1.85 (159)
mainstem, MCN to ICH or PRA 0 (1446) 56.34 (34)
mainstem, PRA to RIS 5.16 (11) 1.9 (6)
mainstem, RIS to RRE 1.51 (7) NA (0)
mainstem, RRE to WEL 0 (1) NA (0)
mainstem, upstream of WEL 0 (1) NA (0)
mainstem, ICH to LGR 0 (1330) 36.94 (36)
mainstem, upstream of LGR 0 (1299) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Clearwater River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 19.52 (5045) 16.69 (206)
mainstem, MCN to ICH or PRA 18.66 (4004) 12.47 (33)
mainstem, PRA to RIS 18.43 (12) 11.33 (3)
mainstem, RIS to RRE 17.68 (8) 11.15 (3)
mainstem, RRE to WEL 16.74 (8) 10.26 (3)
mainstem, upstream of WEL 13.19 (8) NA (0)
mainstem, ICH to LGR 16.24 (3847) 8.08 (57)
mainstem, upstream of LGR 14.76 (3732) 11.42 (5)
Median upstream and downstream spill conditions (kcfs) for Clearwater River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 1.31 (5045) 1.21 (206)
mainstem, MCN to ICH or PRA 0 (4004) 0.67 (33)
mainstem, PRA to RIS 2.12 (12) 0.8 (3)
mainstem, RIS to RRE 7.96 (8) 0 (3)
mainstem, RRE to WEL 0 (8) 0 (3)
mainstem, upstream of WEL 0.03 (8) NA (0)
mainstem, ICH to LGR 0 (3847) 0.38 (57)
mainstem, upstream of LGR 0 (3732) 36.66 (5)



Final fates of Imnaha River Steelhead.
Final fates of Imnaha River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Imnaha River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.59 (1387) 17.45 (114)
mainstem, MCN to ICH or PRA 19.49 (1098) 19.58 (75)
mainstem, PRA to RIS 19.45 (28) 12.01 (14)
mainstem, RIS to RRE 18.8 (18) 11.25 (7)
mainstem, RRE to WEL 18.28 (10) 12.88 (5)
mainstem, upstream of WEL 16.91 (6) NA (0)
mainstem, ICH to LGR 17.17 (1061) 16.58 (29)
mainstem, upstream of LGR 16.36 (991) NA (0)
Median upstream and downstream spill conditions (kcfs) for Imnaha River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.14 (1387) 1.32 (114)
mainstem, MCN to ICH or PRA 0.83 (1098) 1.47 (75)
mainstem, PRA to RIS 7.5 (28) 6.1 (14)
mainstem, RIS to RRE 0 (18) 0 (7)
mainstem, RRE to WEL 0.01 (10) 0 (5)
mainstem, upstream of WEL 0.16 (6) NA (0)
mainstem, ICH to LGR 0 (1061) 0.61 (29)
mainstem, upstream of LGR 0 (991) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Imnaha River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.7 (3815) 18.43 (248)
mainstem, MCN to ICH or PRA 19.68 (2953) 18.86 (149)
mainstem, PRA to RIS 19.13 (78) 13.29 (16)
mainstem, RIS to RRE 18.52 (40) 11.66 (8)
mainstem, RRE to WEL 18.25 (29) 9.48 (6)
mainstem, upstream of WEL 15.55 (23) NA (0)
mainstem, ICH to LGR 17.34 (2827) 17.54 (67)
mainstem, upstream of LGR 16.67 (2642) 14.94 (1)
Median upstream and downstream spill conditions (kcfs) for Imnaha River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 85.63 (3815) 1.28 (248)
mainstem, MCN to ICH or PRA 0 (2953) 0.43 (149)
mainstem, PRA to RIS 2.28 (78) 2.82 (16)
mainstem, RIS to RRE 0 (40) 14.37 (8)
mainstem, RRE to WEL 0 (29) 2.18 (6)
mainstem, upstream of WEL 0 (23) NA (0)
mainstem, ICH to LGR 0 (2827) 0.07 (67)
mainstem, upstream of LGR 0 (2642) 27.86 (1)



Final fates of Grande Ronde River Steelhead.
Final fates of Grande Ronde River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Grande Ronde River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.35 (766) 17.89 (71)
mainstem, MCN to ICH or PRA 19.12 (595) 17.12 (36)
mainstem, PRA to RIS 19.23 (18) 9.85 (4)
mainstem, RIS to RRE 18.59 (9) 9.54 (2)
mainstem, RRE to WEL 13.78 (6) 10.08 (1)
mainstem, upstream of WEL 13.68 (4) NA (0)
mainstem, ICH to LGR 16.7 (575) 17.12 (19)
mainstem, upstream of LGR 15.8 (546) NA (0)
Median upstream and downstream spill conditions (kcfs) for Grande Ronde River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 90.68 (766) 1.33 (71)
mainstem, MCN to ICH or PRA 1.31 (595) 73.47 (36)
mainstem, PRA to RIS 7.59 (18) 15.55 (4)
mainstem, RIS to RRE 0 (9) 7.04 (2)
mainstem, RRE to WEL 3.42 (6) 0 (1)
mainstem, upstream of WEL 10.08 (4) NA (0)
mainstem, ICH to LGR 0 (575) 8.86 (19)
mainstem, upstream of LGR 0 (546) NA (0)
Median upstream and downstream temperature conditions (degrees Celsius) for Grande Ronde River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.6 (6287) 18.48 (271)
mainstem, MCN to ICH or PRA 19.18 (4642) 17.3 (113)
mainstem, PRA to RIS 19.1 (58) 10.31 (15)
mainstem, RIS to RRE 18.14 (30) 5.11 (9)
mainstem, RRE to WEL 17.28 (21) 4.71 (6)
mainstem, upstream of WEL 13.87 (16) NA (0)
mainstem, ICH to LGR 16.78 (4501) 17.05 (73)
mainstem, upstream of LGR 15.52 (4294) 6.98 (1)
Median upstream and downstream spill conditions (kcfs) for Grande Ronde River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 81.85 (6287) 1.25 (271)
mainstem, MCN to ICH or PRA 0 (4642) 0.18 (113)
mainstem, PRA to RIS 5.18 (58) 4.56 (15)
mainstem, RIS to RRE 0 (30) 0 (9)
mainstem, RRE to WEL 0.22 (21) 1.11 (6)
mainstem, upstream of WEL 0.16 (16) NA (0)
mainstem, ICH to LGR 0 (4501) 0 (73)
mainstem, upstream of LGR 0 (4294) 14.69 (1)



Final fates of Salmon River Steelhead.
Final fates of Salmon River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Salmon River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.43 (1115) 19.29 (63)
mainstem, MCN to ICH or PRA 19.63 (891) 19.61 (28)
mainstem, PRA to RIS 20.13 (5) 9.18 (1)
mainstem, RIS to RRE 19.62 (2) 8.7 (1)
mainstem, RRE to WEL 19.51 (2) 19.24 (1)
mainstem, upstream of WEL 18.64 (2) NA (0)
mainstem, ICH to LGR 17.38 (874) 17.28 (27)
mainstem, upstream of LGR 16.85 (852) 15.85 (1)
Median upstream and downstream spill conditions (kcfs) for Salmon River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 52.12 (1115) 1.29 (63)
mainstem, MCN to ICH or PRA 0 (891) 58.97 (28)
mainstem, PRA to RIS 26.75 (5) 24.62 (1)
mainstem, RIS to RRE 3.91 (2) 11.26 (1)
mainstem, RRE to WEL 3.17 (2) 2.08 (1)
mainstem, upstream of WEL 0.24 (2) NA (0)
mainstem, ICH to LGR 0 (874) 0.08 (27)
mainstem, upstream of LGR 0 (852) 37.39 (1)
Median upstream and downstream temperature conditions (degrees Celsius) for Salmon River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.46 (10178) 17.75 (859)
mainstem, MCN to ICH or PRA 19.18 (8459) 18.6 (266)
mainstem, PRA to RIS 18.71 (174) 13.1 (51)
mainstem, RIS to RRE 17.84 (124) 9.48 (23)
mainstem, RRE to WEL 17.56 (92) 9.54 (21)
mainstem, upstream of WEL 14.67 (74) 7.15 (8)
mainstem, ICH to LGR 16.85 (7856) 17.19 (149)
mainstem, upstream of LGR 15.76 (7507) 13.23 (3)
Median upstream and downstream spill conditions (kcfs) for Salmon River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 68.76 (10178) 1.24 (859)
mainstem, MCN to ICH or PRA 0 (8459) 0.02 (266)
mainstem, PRA to RIS 2.7 (174) 2.17 (51)
mainstem, RIS to RRE 0 (124) 0 (23)
mainstem, RRE to WEL 0 (92) 0 (21)
mainstem, upstream of WEL 0.02 (74) 0.9 (8)
mainstem, ICH to LGR 0 (7856) 0 (149)
mainstem, upstream of LGR 0 (7507) 40.86 (3)



Final fates of Tucannon River Steelhead.
Final fates of Tucannon River Steelhead.
Median upstream and downstream temperature conditions (degrees Celsius) for Tucannon River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.56 (600) 17.94 (46)
mainstem, MCN to ICH or PRA 19.08 (479) 16.04 (37)
mainstem, PRA to RIS 19.65 (15) 14.48 (3)
mainstem, RIS to RRE 18.75 (8) 9.6 (2)
mainstem, RRE to WEL 17.67 (6) 9.54 (2)
mainstem, upstream of WEL 13.64 (6) NA (0)
mainstem, ICH to LGR 16.67 (472) 6.42 (148)
mainstem, upstream of LGR 15.09 (356) 9.94 (3)
Median upstream and downstream spill conditions (kcfs) for Tucannon River Wild Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 89.21 (600) 1.21 (46)
mainstem, MCN to ICH or PRA 0.05 (479) 35.04 (37)
mainstem, PRA to RIS 7.84 (15) 6.77 (3)
mainstem, RIS to RRE 0.01 (8) 10.95 (2)
mainstem, RRE to WEL 0 (6) 3.64 (2)
mainstem, upstream of WEL 0.09 (6) NA (0)
mainstem, ICH to LGR 0 (472) 3.39 (148)
mainstem, upstream of LGR 0.1 (356) 20.83 (3)
Median upstream and downstream temperature conditions (degrees Celsius) for Tucannon River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 20.58 (3007) 16.61 (274)
mainstem, MCN to ICH or PRA 19.42 (2458) 17.25 (115)
mainstem, PRA to RIS 19.56 (48) 13.62 (10)
mainstem, RIS to RRE 19.05 (25) 3.88 (5)
mainstem, RRE to WEL 19.14 (14) 16.11 (3)
mainstem, upstream of WEL 17.09 (11) NA (0)
mainstem, ICH to LGR 17.14 (2167) 6.64 (700)
mainstem, upstream of LGR 15.66 (1635) 7.96 (3)
Median upstream and downstream spill conditions (kcfs) for Tucannon River Hatchery Steelhead, with sample sizes shown in parentheses.
state upstream downstream
mainstem, BON to MCN 88.43 (3007) 1.91 (274)
mainstem, MCN to ICH or PRA 29.57 (2458) 46.77 (115)
mainstem, PRA to RIS 1.85 (48) 1.09 (10)
mainstem, RIS to RRE 0 (25) 0 (5)
mainstem, RRE to WEL 1.32 (14) 0.09 (3)
mainstem, upstream of WEL 0 (11) NA (0)
mainstem, ICH to LGR 0 (2167) 4.07 (700)
mainstem, upstream of LGR 0.11 (1635) 18.83 (3)